Geologic Time
Scales
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Geologic Time ScalesDevonian PeriodDating from 410-360mya, the Devonian Period saw a greater diversity on land. Ferns, horsetails, and the first seed plants, gymnosperms, appeared. Amphibians evolved during the Devonian also. Echinoderms and coral were very common by this time. The Devonian ended with another major extinction. |